package acm.pta14;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
import java.util.StringTokenizer;

public class 字母串 {
    public static void main(String[] args) {
        Reader sc = new Reader();
        int n = sc.nextInt();
        while (n-- > 0) {
            String line = sc.nextLine();
            int last = line.length()-1;
            boolean flag = true;
            for (int i = 0; i < last; i++) {
                char cur = line.charAt(i);
                if (cur >= 'a' && cur <= 'z') {   //小写
                    flag=line.charAt(i+1) == cur - 32||line.charAt(i+1) == cur - 1;
                }else {
                    flag=line.charAt(i+1) == cur + 32||line.charAt(i+1) == cur + 1;
                }
                if (!flag) break;
            }
            System.out.println(flag?"Y":"N");
        }
    }
    static
    class Reader {
        private BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        private StringTokenizer tokenizer = new StringTokenizer("");

        private String innerNextLine() {
            try {
                return reader.readLine();
            } catch (IOException ex) {
                return null;
            }
        }

        public boolean hasNext() {
            while (!tokenizer.hasMoreTokens()) {    //内存中没有
                String nextLine = innerNextLine();
                if (nextLine == null) {     //且没有下一行
                    return false;
                }
                tokenizer = new StringTokenizer(nextLine);  //读入一行
            }
            return true;
        }

        public String nextLine() {
            tokenizer = new StringTokenizer("");    //清空内存中的字符
            return innerNextLine();
        }
        public void clear(){
            tokenizer = new StringTokenizer("");
        }

        public String next() {
            hasNext();
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

        public double nextDouble(){
            return Double.parseDouble(next());
        }
//    public BigInteger nextBigInt() {
//        return new BigInteger(next());
//    }
    }

}
